Magazine stove having internal airheating chamber means



March 27, 1951 K. A. NIERMEYER MAGAZINE STOVE HAVING INTERNAL AIR HEATING CHAMBER MEANS 2 Sheets$heet 1 Filed May 7, 1947 W Y E March 27, 1951 K A NlERMEYER 2,546,675

MAGAZINE s'i'ovE HAVING INTERNAL AIR HEATING CHAMBER MEANS Filed May 7, 1947 2 Sheets-Sheet 2 137 van/b r Patented Mar. 27, 1951 MAGAZKNE STUVE HAVING INTERNAL AIR- HEATING CHAMBER MEANS Karel A. Niermeyer, Leeuwarden, Netherlands Application May 7, 1947, Serial No. 746,550 In the Netherlands October 12, 1938 Section 1, Public Law 690, August 8,1946 Patent expires October 12, 1958 3 Claims.

This invention relates to a stove having a fuel reservoir the front side of which is open at its upper end for forming a filling opening and said reservoir is cooled by air entering at the back.

Stoves of this kind are known the fuel reservoir of which has double walls forming a cooling jacket in the lower end of which the air enters through an aperture at the rear wall of the stove and leaves the cooling jacket at the front below the filling opening.

The invention has for its object to improve a stove of this kind in such a manner that an enicient circulation of the cooling air in contact with the fuel reservoir is secured and thus the air in the room is rapidly heated.

With this object in view according to the invention a fiat air box is provided at both sides of the fuel reservoir, said boxes at the top being at least partly open and at the front wall of the fuel reservoir being in communication with each other by a channel situated below the filling opening. Said air boxes are near their lower end each provided with two inlet openings for the air at the rear wall of the stove, a bafile being provided in the box above each opening in such a manner that the bafile above the lower inlet opening extends in forward direction farther than the baffle above the upper inlet opening. With this arrangement a powerful ascending air flow is obtained over the whole width of the air boxes by the natural draught, said flow being still strengthened by the channel provided below the filling opening, as said channel receives a large amount of heat both by the radiation of the fire and from the gases of combustion and therefore furthers the draught at the inlet openings for the air.

In order to further increase the draught produced by the cross channel arranged below the filling opening both the lower baffles or one of them may be extended into said channel at the front wall of the fuel reservoir. I

In order to make the invention more clearly understood one embodiment thereof is illustrated by way of example in the accompanying drawing, which only shows the internal parts of a stove, the outer casing and also the head which closes the fuel reservoir at the top being omitted.

Fig. 1 is a front view of said internal parts and Fig. 2 is a vertical section thereof taken along the line IIII in Fig. 1. Fig. 3 is a plan view of Fig. 1 showing the interior of the fuel reservoir. Figure 4 shows a rear view of the stove body and Figure 5 is a plan sectional view of the fuel reservoir taken along the line V-V in Figure 4..

The fuel reservoir i has a rectangular crosssection and double walls 2, 3 at either side so as to form boxes 4. 5 which at the rear wall are each provided with an inlet opening 6 and at the top are fully open. At the front wall "I of the fuel reservoir a channel 8 is formed below the filling opening, said channel connecting both lateral boxes 4, 5 with each other, so that also the front wall of the fuel reservoir is cooled. In each box 4, 5 a bailie 9 is provided above the inlet opening 6 which extends at the front wall of the fuel reservoir into the channel 8 and forms a battle Hl which compels the entering air to flow also along the front wall I of the fuel reservoir according to the arrows shown in Fig. 1. Above the inlet openings 6 further openings I l are provided in the rear wall of the stove and a baflle I2 extends above said openings.

The fuel reservoir terminates above the fire box hi into a funnel l3 so that the fuel is spread in the form of a pyramid. The funnel [3 may easily be replaced. The gases of combustion which free- 1y rise along all sides of the fuel reservoir laterally escape through both openings I5 into a circulation box H? which may have every desired shape.

As particularly the cross channel 8 is not only subjected to heating by the ascending gases of combustion but also to the radiant heat of the fire said channel will strengthen the draught at the inlet opening 6 with the result that by injector action also the flow of air in the opening I l is strengthened so that an efficient air circulation is secured.

It is to be noted that the invention is not restricted to the above described embodiment as within the scope of the invention severa1 modi' fications may be provided. Thus the rear wall of the stove may form at thesame time the rear wall of the fuel reservoir so that only at three sides the fuel forms a sloping surface.

What I claim is:

1. In a stove, in combination, a casing forming a combustion chamber, a fuel reservoir extending into the combustion chamber and havin a filling opening at its upper front portion, an air flow duct disposed on each side of said reservoir and forming part of the walls thereof, said ducts extending into and being in heat exchange relationship with said combustion chamber, each of said ducts having an outlet opening at the upper part of the reservoir and exterior of the combustion chamber and two superposed inlet openings in the lower portion of the rear wall of each duct exterior to the combustion chamber, said openings in each duct being separated by a forwardly extending baffle, and a communicating '3 channel at the front of said reservoir connecting the said air flow ducts.

2. A stove as defined in claim 1 wherein said bafiie in each of said air flow ducts extends forwardiy into said communicating channel.

3. In a stove, in combination, a casing forming a combustion chamber, a fuel reservoir extending into the combustion chamber and having a filling opening at its upper front portion, an air flow duct disposed on each side of said reser- A voir and forming part of the walls thereof, said ducts extending into and being in heat exchange relationship with said combustion chamber, each of said ducts having an outlet opening at the upper part of the reservoir and exterior of the combustion chamber and two superposed inlet openings in the lower portion of the rear wall of each duct exterior to the combustion chamber, said openings in each duct being separated by 4 a forwardly extending lower bafiie, a communicating channel at the front of said reservoir connecting the said air flow ducts, and a forwardly extending upper bafiie disposed above the uppermost of said superposed inlet openings in each of said air flow ducts, said lower baflies extending forwardly a greater distance than said upper bafiles.

KAREL A. NIERMEYER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 93,821 Harwood Aug. 17, 1869 108,733 Beard Oct. 25, 1870 1,491,191 Bruder Apr. 22, 1924 

